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Re: [Xen-devel] Automotive PV drivers project request

David, Lars,

Indeed, userspace drivers in Android essentially are set of so libraries for libhardware which provides some sort of a HAL to kenel drivers. In order to simplify things we can avoid kernel drivers in Andorid and go straight to userspace.

I do not think that it is correct to mix PV drivers backends with QEMU, we do not do full emulation in most cases, just PVHVM

Artem Mygaiev |ÂAVP - Delivery
P +380.44.4929695 ext.2023Â
M +380.67.9211131 S rosenkrantzguildenstern

On Tue, Jun 10, 2014 at 5:09 PM, Lars Kurth <lars.kurth@xxxxxxx> wrote:
On 10/06/2014 13:38, David Vrabel wrote:
On 05/06/14 14:22, Artem Mygaiev wrote:
David, agree on all kernel drivers but what about userspace backends
and other OSes?
I don't have an opinion on user space drivers. ÂI would suggest that
userspace backends live with the existing ones in qemu.

Are userspace frontends useful? ÂIsn't a kernel driver required for
proper access control?

I believe the answer is in http://wiki.xenproject.org/wiki/XPDS13_BoF_Notes_:_Seeding_an_Android_and_Embedded_ecosystem#Missing_Pieces_for_a_complete_Android_system_on_top_of_Xen

As far as I understand, Android requires functionality to be made available via userspace drivers. These would sit on top of the kernel drivers.


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